it is ridiculously difficult to get a sexual assault case to guilty verdict
Actually once a case gets to court the conviction rate is higher than for most major crimes - over 50%. The difficulty is getting a case to court in the first place, the most common problem being the victim withdrawing their complaint.
the difference is the defendant and his team can make up any old evidence the like with no requirement to prove it's true
Rubbish. If the defence put forward evidence without any corroboration the jury is likely to ignore it. And if we want to get into made up evidence, how about the evidence given by a certain forensic "expert" that led to the false convictions of at least half a dozen women for killing their children. There are many other high profile miscarriages of justice where the prosecution witnesses, including the police and expert witnesses, made claims that were simply untrue.
Both sides are under the same pressure to make the evidence they put forward stand up. The jury then, in theory, has to decide whether or not the prosecution has proved its case. However, the research available suggests that a significant proportion of juries make their decision on the balance of probability.
None of the above is in any way an opinion on the guilt or innocence of DLT or the other accused.